Waiting to Miscarry...

Some of you have heard my story. I went in for an u/s last Monday at 6wks1day and there was a gest sac- I started bleeding Tues and went in Wed for an u/s at 6wks 3 days and the baby looked fine- there was growth for the last 2 days- a gest and yolk sac. I have bled for the last 6 days like a lt period- no cramping and no clotting. I went in today for a 7wk1day u/s and there was no fetal pole or heartbeat and the sac was oblong. There was a SCH bigger than the sac. The Dr told me I was in the process of miscarrying and to go home and wait for it to happen this wk. This SUCKS. I have had 2 totally healthy pregnancies and now this....and to wait to miscarry- what should I expect>